Department of Microelectronics
Faculty of Electrical Engineering, Mathematics, and Computer Science

dr.ir. M. Mehr

Postdoc
Electronic Components, Technology and Materials (ECTM), Department of Microelectronics

PhD thesis (Nov 2015): Organic Materials Degradation in Solid State Lighting Applications
Promotor: GuoQi Zhang

Biography

Maryam Yazdanmehr is a Research Associate (Post-doc) in the Electronic Components, Technology, and Materials (ECTM) group at Delft University of Technology (TU Delft). She obtained her Master’s degree in Materials Engineering at TU Delft (2009–2011), followed by her Ph.D. in the ECTM group (2011–2015) under the supervision of Prof. Zhang and Prof. Van Driel.

Her research focuses on the reliability and accelerated aging test methodologies of microelectronic materials and components. She has contributed to the development of multi-component reliability models for packaging materials and is currently investigating degradable and biodegradable materials and sensors.

She has been actively engaged in international collaborations during her doctoral and postdoctoral projects, including:

  • University of Antwerp, Belgium (Prof. Leartz, 2019–2021)
  • Ibaraki University, Japan (Prof. Udono, July–September 2013)
  • Dow Corning, Japan (Summer 2013)
  • University of Manchester, UK (Prof. Sven Schroeder, Autumn 2014)

Her research has been supported by several competitive grants, including:

  • 4TU Grant (2023)
  • HTSM–NWO/TTW Grant, RESDAD Project (2019)
  • HTSM–NWO/TTW Grant, Reliability of Optical Materials in LED-based Products under Harsh Environments (REOPT) (2016)

Her publications are accessible via her Google Scholar profile.

 

Projects history

Material Degradation in Solid State Lightening Applications

  1. Reliability of Organic Compounds in Microelectronics and Optoelectronics
    Willem Dirk van Driel; Maryam Yazdan Mehr; Xuejun Fan; GuoQi Zhang (Ed.);
    Springer, , 2022. DOI: 10.1007/978-3-030-81576-9

  2. Degradation and Failures of Polymers Used in Light-Emitting Diodes
    Maryam Yazdan Mehr; W. D. van Driel; GuoQi Zhang;
    Springer, , 2022. DOI: 10.1007/978-3-030-81576-9_8

  3. Outlook: From Physics of Failure to Physics of Degradation
    W. D. van Driel; Maryam Yazdan Mehr; X. J. Fan; GuoQi Zhang;
    Springer, , 2022. DOI: 10.1007/978-3-030-81576-9_17

  4. Facile Synthesis of Ag Nanowire/TiO2 and Ag Nanowire/TiO2/GO Nanocomposites for Photocatalytic Degradation of Rhodamine B
    Hajipour, Pejman; Bahrami, Abbas; Mehr, Maryam Yazdan; van Driel, Willem Dirk; Zhang, GuoQi;
    Materials,
    Volume 14, Issue 4, 2021. DOI: 10.3390/ma14040763
    document

  5. Towards Multi-Functional SiO2@YAG:Ce Core–Shell Optical Nanoparticles for Solid State Lighting Applications
    Mahdi Kiani Khouzani; Abbas Bahrami; Maryam Yazdan Mehr; Willem Dirk van Driel; GuoQi Zhang;
    Nanomaterials,
    Volume 10, Issue 1, pp. 153, 2020. DOI: 10.3390/nano10010153

  6. Spark plasma sintering of Ni 3 Al-xB-1wt% CNT (0.0 < x < 1.5 at%) nanocomposite
    Mohammadnejad, A.; Bahrami, A.; Sajadi, M.; Mehr, M. Y.;
    Journal of Alloys and Compounds,
    2019. DOI: 10.1016/j.jallcom.2019.02.225

  7. Root cause analysis of surface cracks in heavy steel plates during the hot rolling process
    Bahrami, A.; Khouzani, M. K.; Mokhtari, S. A.; Zareh, S.; Mehr, M. Y.;
    Metals,
    2019. DOI: 10.3390/met9070801

  8. Spark plasma sintering of Stellite®-6 superalloy
    M. Kiani Khouzani; A. Bahrami; M. Yazdan Mehr;
    Journal of Alloys and Compounds,
    Volume 782, pp. 461-468, 2019.

  9. Modeling electrical resistivity of naturally aged Al–Mg–Si Alloys
    Bahrami, A.; Mehr, M. Y.;
    Metals,
    2019. DOI: 10.3390/met9030310

  10. Degradation of bisphenol-a-polycarbonate (BPA-PC) optical lenses under simulated harsh environment conditions
    Mehr, M. Y.; Van Driel, W.; GuoQi Zhang;
    In 20th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems, EuroSimE 2019,
    2019. DOI: 10.1109/EuroSimE.2019.8724524

  11. A review on discoloration and high accelerated testing of optical materials in LED based-products
    M. Yazdan Mehr; M.R. Toroghinejad; F. Karimzadeh; W.D. van Driel; GuoQi Zhang;
    Microelectronics Reliability,
    Volume 81, pp. 136-142, 2018.

  12. Failure of AISI 304H stainless steel elbows in a heat exchanger
    A. Bahrami; S. H. Mousavi Anijdan; P. Taheri; M. Yazdan Mehr;
    Engineering Failure Analysis,
    Volume 90, pp. 397-403, 2018.

  13. Microstructure and mechanical properties of spark plasma sintered nanocrystalline Ni3Al-xB alloy
    Mohammadnejad, A.; Bahrami, A.; Sajadi, M.; Karimi, P.; Fozveh, H. R.; Mehr, M. Y.;
    Materials Today Communications,
    2018. DOI: 10.1016/j.mtcomm.2018.09.002

  14. Reliability and Lifetime Assessment of Optical Materials in LED-Based Products
    Maryam Yazdan Mehr; Willem Dirk van Driel; GuoQi Zhang;
    In Solid State Lighting Reliability Part 2,
    Springer, 2018.

  15. Effects of Graphene Monolayer Coating on the Optical Performance of Remote Phosphors
    Maryam Yazdan Mehr; S. Vollebregt; W. D. van Driel; GuoQi Zhang;
    Journal of Electronic Materials,
    Volume 46, Issue 10, pp. 5866--5872, 2017. DOI: 10.1007/s11664-017-5592-8
    Keywords: ... graphene, Light-emitting diode, reliability, remote phosphor.

  16. Toward Solving Multichannel RF-SoC Integration Issues Through Digital Fractional Division
    S. A. R. Ahmadi Mehr; M. Tohidian; R. B. Staszewski;
    IEEE Transactions on Very Large Scale Integration (VLSI) Systems,
    Volume 24, Issue 3, pp. 1071-1082, March 2016. DOI: 10.1109/TVLSI.2015.2436979
    Keywords: ... frequency dividers;system-on-chip;LC-tank oscillator;RF system on chips;digital fractional divider;frequency divider;frequency planning technique;high-swing class-C oscillator;integer harmonic frequency relationship;multichannel RF-SoC integration;phase rotator;Couplings;Frequency conversion;Frequency modulation;Harmonic analysis;Oscillators;Radio frequency;Substrates;Digital fractional divider;RF-SoC;digitally controlled oscillator (DCO);frequency pulling;injection locking;multi-core radio;system on chip (SoC);system on chip (SoC)..

  17. Degradation of Microcellular PET Reflective Materials Used in LED-based Products
    Guangjun Lu; W.D. van Driel; Xuejun Fan; M. Yazdan Mehr; Jiajie Fan; K.M.B. Jansen; GuoQi Zhang;
    Optical Materials,
    Volume 49, pp. 79-84, 2015.

  18. Color shift investigations for LED secondary optical designs: Comparison between BPA-PC and PMMA
    Guangjun Lu; M. Yazdan Mehr; W.D. van Driel; Xuejun Fan; Jiajie Fan; K.M.B. Jansen; GuoQi Zhang;
    Optical Materials,
    Volume 45, pp. 37-41, 2015.

  19. Design of RF Oscillators for Wireless Digital Transmitters
    S.A.R. Ahmadi Mehr;
    PhD thesis, Delft University of Technology, http://doi.org/10.4233/uuid:f1b09f61-d1ea-4c17-b7a7-0e3e353d41b7, 09 2015. Promotor: R.B. Staszewski.

  20. Organic Materials Degradation in Solid State Lighting Applications
    Maryam Yazdan Mehr;
    PhD thesis, Delft University of Technology, 2015.
    document

  21. Surface aspects of discolouration in Bisphenol A Polycarbonate (BPA-PC), used as lens in LED-based products
    Maryam Yazdan Mehr; W. D. van Driel; H. Udono; GuoQi Zhang;
    Optical Materials,
    Volume 37, pp. 155-159, 2014.

  22. Reliability and optical properties of LED lens plates under high temperature stress
    Maryam Yazdan Mehr; van Driel, WD; Koh, SW; GuoQi Zhang;
    Microelectronics Reliability,
    2014.

  23. Accelerated life time testing and optical degradation of remote phosphor plates
    Maryam Yazdan Mehr; van Driel, WD; GuoQi Zhang;
    Microelectronics Reliability,
    Volume 54, Issue 8, pp. 1544-1548, 2014.

  24. Lifetime assessment of Bisphenol-A Polycarbonate (BPA-PC) plastic lens, used in LED-based products
    Maryam Yazdan Mehr; van Driel, WD; Jansen, KMB; Deeben, P; GuoQi Zhang;
    Microelectronics Reliability,
    Volume 54, Issue 1, pp. 138-142, 2014.

  25. Reliability of LED-based Products is a Matter of Balancing Temperatures
    Maryam Yazdan Mehr; W.D. van Driel; GuoQi Zhang;
    In Therminic Conference,
    2014.

  26. High Accelerated Optical Remote Phosphor Aging Studies for LED Luminaire Applications
    W. D. v. Driel; Maryam Yazdan Mehr; GuoQi Zhang;
    In 11th China SSL conference,
    2014.

  27. Colour shift in remote phosphor based LED products
    Maryam Yazdan Mehr; Driel, WD van; GuoQi Zhang;
    In Proceedings - 64th Electronic Components and Technology Conference,
    pp. 1477-1481, 2014.

  28. Reliability and accelerated test methods for plastic materials in LED-based products
    Maryam Yazdan Mehr; van Driel, WD; GuoQi Zhang;
    In Proceedings - 15th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems,
    pp. 1-5, 2014.

  29. Investigation of color shift of LEDs-based lighting products
    Koh, SW; Huaiyu Ye; Maryam Yazdan Mehr; Jia Wei; van Driel, WD; Zhao, LB; GuoQi Zhang;
    In Proceedings - 15th International Conference on Thermal, Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems,
    pp. 1-5, 2014.

  30. Photodegradation of bisphenol A polycarbonate under blue light radiation and its effect on optical properties
    Maryam Yazdan Mehr; W. D. van Driel; K. M. B. Jansen; P. Deeben; M. Boutelje; GuoQi Zhang;
    Optical Materials,
    Volume 35, pp. 504-508, 2013.

  31. Dual-core high-swing class-C oscillator with ultra-low phase noise
    M. Tohidian; S. A. Reza Ahmadi Mehr; R. B. Staszewski;
    In 2013 IEEE Radio Frequency Integrated Circuits Symposium (RFIC),
    pp. 243-246, June 2013.

  32. Prime microlens arrays for Hartmann-Shack sensors: an economical fabrication technology
    D.W. de Lima Monteiro; O. Akhzar Mehr; G.V. Vdovin;
    In U Wittrock (Ed.), Adaptive optics for industry and medicine: Proceedings of the 4th international workshop,
    Springer, pp. 197-206, 2005.

  33. Arrays of spherical micromirrors and molded microlenses fabricated with bulk Si micromachining
    G.V. Vdovin; O. Akhzar Mehr; P.M. Sarro; D.W. de Lima Monteiro; M.Y. Loktev;
    In Proc. SPIE: MEMS/MOEMS: Advances Photonic Communications, Sensing, Metrology, Packaging and Assembly,
    Brugge, Belgium, pp. 107-111, Oct. 2002.

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Last updated: 10 Feb 2026

Maryam Yazdan Mehr